An off-plan purchase can give an investor time to prepare for completion, but that does not remove the need to fund new build deposits early in the process. A reservation fee may be due within days, followed by an exchange deposit commonly set at 10% of the purchase price. For buy-to-let investors, the key question is not simply whether the deposit is available now, but whether using it leaves enough liquidity for mortgage costs, tax, furnishing, voids and the unexpected.
What a new build deposit usually involves
The first payment is typically a reservation fee. This secures the chosen flat for a limited period while solicitors complete due diligence and the buyer progresses towards exchange. It is usually deducted from the purchase price, subject to the terms in the reservation agreement, but buyers should read those terms carefully. There can be circumstances in which some or all of the fee is non-refundable.
The larger payment follows on exchange of contracts. In many off-plan transactions, this is 10%, although the exact percentage, payment date and any staged deposit arrangement depend on the individual development and contract. The deposit is normally held by the developer’s solicitor or stakeholder in accordance with the contract. Your solicitor should confirm where the money will be held and what protection applies should the developer fail to complete the scheme.
For a £250,000 flat, a 10% exchange deposit is £25,000. That is meaningful capital to commit before the property is built, so it should be viewed as part of the full acquisition budget rather than as an isolated upfront cost.
How to fund new build deposits sensibly
The right source of funds depends on an investor’s wider financial position, tax circumstances and tolerance for debt. Cash savings are the most straightforward route, particularly for buyers who want to preserve borrowing capacity for future purchases. Yet using every available pound of savings can create a fragile position if completion costs or mortgage payments rise.
A sensible approach is to separate the deposit from the contingency reserve. The reserve should cover the costs that do not disappear once contracts are exchanged: legal fees, mortgage arrangement fees, valuation costs, Stamp Duty Land Tax where applicable, furnishing, insurance and several months of property outgoings. A buy-to-let flat may not let immediately after completion, even in a market with established tenant demand.
Using savings and investment proceeds
Savings are often appropriate when they can be accessed without an excessive penalty or forcing the sale of investments at an unfavourable time. Investors should consider the opportunity cost too. Cash used as a deposit cannot also support a refurbishment, another acquisition or personal financial commitments.
If the funds come from selling shares or other investments, allow for settlement times and possible tax implications. Do not rely on a sale completing at the last minute. Exchange deadlines are contractual, and missing one can put the reservation and purchase at risk.
Releasing equity from an existing home or portfolio
Equity release through a remortgage or further advance can provide a deposit without selling assets. For existing landlords, this can be an efficient way to redeploy capital from a property with substantial equity into a different location or tenant market.
The trade-off is clear: borrowing against an existing asset increases monthly debt commitments and may expose the investor to higher rates. Lenders will assess affordability, loan-to-value and rental coverage. A plan that works only at one interest-rate assumption is not a durable plan. Stress test both the existing property and the new purchase before proceeding.
Using a bridging loan
Bridging finance is sometimes used where capital is tied up in a sale or another asset and timing is the main problem. It can be useful in narrow circumstances, but it is expensive compared with conventional mortgage finance and should have a credible, documented exit route.
For a standard off-plan buy-to-let purchase, a bridge is rarely the first option. Interest, fees and the risk of a delayed asset sale can erode the benefit of securing a particular unit. Investors should take regulated financial advice where appropriate and obtain legal advice on any borrowing arrangement.
Gifted deposits and company funds
A gifted deposit may be accepted by some lenders, but the lender and solicitor will need evidence of the source of funds, confirmation that the money is genuinely a gift and identification documents from the donor. Anti-money laundering checks are routine and can take time, especially where funds have moved through several accounts or originate overseas.
Buying through a limited company raises different questions. Company funds may be used for a purchase in the company name, but moving money between a director and the company can have accounting and tax consequences. An accountant should advise before funds are transferred. It is not sensible to treat company cash as personal cash simply because it is accessible.
Match the deposit plan to the mortgage timeline
A common misunderstanding is that a mortgage offer must be in place when an investor exchanges on an off-plan flat. In reality, a conventional buy-to-let mortgage is usually drawn down at completion, which may be months or longer after exchange. Mortgage offers have limited validity periods, so obtaining an offer too early can create a need to reapply before completion.
That does not mean finance can be ignored until the property is ready. Before exchange, investors should speak to a mortgage broker or lender to establish indicative borrowing capacity, likely rental coverage requirements and the type of property they will lend against. This is particularly important for overseas buyers, limited company purchases and applicants with complex income.
At completion, the lender will reassess matters that can change: interest rates, personal circumstances, credit profile, valuation and the anticipated rent. A deposit paid at exchange does not guarantee mortgage approval later. Build enough margin into the plan to manage a lower valuation or reduced loan amount if either occurs.
Account for costs beyond the deposit
The deposit is only one part of the capital requirement. Buy-to-let investors should model the full cash position from reservation through to the first months of tenancy. This should include purchase taxes, solicitor and mortgage fees, furniture where needed, service charge and ground rent arrangements, insurance, management fees and a void-period allowance.
Gross yield is annual rent divided by the purchase price. It is useful for comparing opportunities quickly, but it does not show what remains after finance and operating costs. Net yield deducts relevant costs and offers a more realistic view, although the precise calculation varies according to what is included. Neither figure is a promise of income.
For a Leeds development such as Regency Works, demand should be assessed through the practical reasons tenants choose an area: proximity to major employment, transport, quality of the finished specification and the availability of working and amenity space. Kirkstall Road’s regeneration and access to the city centre and Wellington Place support the rental case, but rents and values can still move in either direction.
Check the contract before releasing funds
A solicitor experienced in new build conveyancing should review the contract, planning position, building warranty, anticipated completion mechanism and deposit provisions before exchange. Off-plan completion dates are often expressed as estimates, with long-stop dates setting the point at which contractual remedies may become relevant. Delays can happen because construction programmes, utilities and sign-off processes do not always run exactly to schedule.
Ask clear questions about what happens to the deposit if the development is delayed, materially changed or not completed. Confirm whether the deposit is protected by a recognised warranty or insurance arrangement, and understand any restrictions on assigning the contract before completion. If buying remotely, ensure every document and payment request is verified through known professional contacts rather than acting on an unexpected email.
Keep liquidity as part of the investment decision
The strongest deposit strategy is usually the least dramatic one: use funds with a clear audit trail, retain a meaningful cash buffer and secure early visibility of likely mortgage affordability. The aim is not to put the largest possible deposit down. It is to buy an asset while remaining able to manage the obligations that follow.
A well-funded purchase gives an investor time and choice if rates change, completion moves or the first tenancy takes longer than expected. Before reserving, set out the whole cash requirement on one page and ask whether the figures still work with a conservative rent, higher borrowing costs and a delayed completion date. If they do, the deposit is serving the investment plan rather than dictating it.